變焦鏡頭的另一缺點是鏡頭的最大光圈（速度）通常較低。 The previous text is in Chinese (Traditional). Here is a translation to Swahili:
Ubaya mwingine wa lenzi za ukuzaji ni kuwa kilango kipana zaidi (kasi) cha lenzi kwa kawaida huwa cha chini.